Try this. Restart your system. load carrara and see what your commit charge is. Shouldn't be above 300mb...I don't believe, probably below that. Then bring in vicky's.cr2 might become close to double. Start with clean file. You have to remember to remove unused master shaders and objects if you are using the same file to import into. In other words you are leaving trash in your file if you don't. The other thing is whether or not the cr2's are defaults or loaded with all the morphs. They can make a file huge. I have heard of some issues w/ slow downs on Macs, but no confirmation on mem usage accompanied that. A large texture cache also appears to drive up the paging file, but not give it back so I would keep that fairly low. Not official just some observations of my own...with a couple of files.

No need to think outside the box....
    Just make it invisible.